Forca RTGS-450-CS Jewelry Carbon Steel Caliper Divider Flat Legs 4&rdquo; ~ 100mm. This tool is Perfect for marking and finding the center of your jewelry measuring the distances between points Also is used for Scribing Circles and Arcs on Sheet Metal. This Caliper Divider Adjustment is made with a knurled setting nut on a threaded rod that allows you to quickly adjust the opening of the caliper and tempered points. This tool have been manufactured with German Anodized Hard Carbon Steel with non-reflective black finish. Overall size: 4- 100 mm. These Dividers are Lifetime Guaranteed